Commentaries:
Jamieson, Fausset, and Brown
sometimes--"once." The emphasis is on "were." Ye ought to have no fellowship with sin, which is darkness, for your state as darkness is now PAST. Stronger than "in darkness" (Romans 2:19).
light--not merely "enlightened"; but light enlightening others (Ephesians 5:13).
in--in union with the Lord, who is THE LIGHT.
children of light--not merely "of the light"; just as "children of disobedience" is used on the opposite side; those whose distinguishing characteristic is light. PLINY, a heathen writing to Trajan, bears unwilling testimony to the extraordinary purity of Christians' lives, contrasted with the people around them.
Other commentary entries containing this verse:
Isaiah 2:5
Isaiah 42:7
Isaiah 42:16
Isaiah 60:1
Ezekiel 2:2
Luke 16:8
John 8:12
Ephesians 4:18
Ephesians 5:10
Ephesians 5:13
Ephesians 5:14
Ephesians 6:12
Philippians 2:15
1 John 1:7
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